ALSA: dice: Split PCM functionality into a file

This commit adds a file and move some codes related to PCM functionality.

Currently PCM playback is supported. PCM capture will be supported in followed
commits.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2014-11-29 00:59:15 +09:00 коммит произвёл Takashi Iwai
Родитель 6eb6c81eee
Коммит c50fb91f53
5 изменённых файлов: 305 добавлений и 292 удалений

Просмотреть файл

@ -1,2 +1,2 @@
snd-dice-objs := dice-transaction.o dice-stream.o dice.o
snd-dice-objs := dice-transaction.o dice-stream.o dice-pcm.o dice.o
obj-m += snd-dice.o

Просмотреть файл

@ -0,0 +1,296 @@
/*
* dice_pcm.c - a part of driver for DICE based devices
*
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
* Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp>
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "dice.h"
static int dice_rate_constraint(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_dice *dice = rule->private;
const struct snd_interval *c =
hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_interval *r =
hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval rates = {
.min = UINT_MAX, .max = 0, .integer = 1
};
unsigned int i, rate, mode, *pcm_channels = dice->rx_channels;
for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
rate = snd_dice_rates[i];
if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
continue;
if (!snd_interval_test(c, pcm_channels[mode]))
continue;
rates.min = min(rates.min, rate);
rates.max = max(rates.max, rate);
}
return snd_interval_refine(r, &rates);
}
static int dice_channels_constraint(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_dice *dice = rule->private;
const struct snd_interval *r =
hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval *c =
hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_interval channels = {
.min = UINT_MAX, .max = 0, .integer = 1
};
unsigned int i, rate, mode, *pcm_channels = dice->rx_channels;
for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
rate = snd_dice_rates[i];
if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
continue;
if (!snd_interval_test(r, rate))
continue;
channels.min = min(channels.min, pcm_channels[mode]);
channels.max = max(channels.max, pcm_channels[mode]);
}
return snd_interval_refine(c, &channels);
}
static int pcm_open(struct snd_pcm_substream *substream)
{
static const struct snd_pcm_hardware hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER,
.formats = AMDTP_OUT_PCM_FORMAT_BITS,
.channels_min = UINT_MAX,
.channels_max = 0,
.buffer_bytes_max = 16 * 1024 * 1024,
.period_bytes_min = 1,
.period_bytes_max = UINT_MAX,
.periods_min = 1,
.periods_max = UINT_MAX,
};
struct snd_dice *dice = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned int i;
int err;
err = snd_dice_stream_lock_try(dice);
if (err < 0)
goto error;
runtime->hw = hardware;
for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
if (dice->clock_caps & (1 << i))
runtime->hw.rates |=
snd_pcm_rate_to_rate_bit(snd_dice_rates[i]);
}
snd_pcm_limit_hw_rates(runtime);
for (i = 0; i < 3; ++i) {
if (dice->rx_channels[i]) {
runtime->hw.channels_min = min(runtime->hw.channels_min,
dice->rx_channels[i]);
runtime->hw.channels_max = max(runtime->hw.channels_max,
dice->rx_channels[i]);
}
}
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
dice_rate_constraint, dice,
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
if (err < 0)
goto err_lock;
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
dice_channels_constraint, dice,
SNDRV_PCM_HW_PARAM_RATE, -1);
if (err < 0)
goto err_lock;
err = amdtp_stream_add_pcm_hw_constraints(&dice->rx_stream, runtime);
if (err < 0)
goto err_lock;
return 0;
err_lock:
snd_dice_stream_lock_release(dice);
error:
return err;
}
static int pcm_close(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
snd_dice_stream_lock_release(dice);
return 0;
}
static int playback_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_dice *dice = substream->private_data;
unsigned int mode, rate, channels, i;
int err;
mutex_lock(&dice->mutex);
snd_dice_stream_stop(dice);
mutex_unlock(&dice->mutex);
err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
params_buffer_bytes(hw_params));
if (err < 0)
return err;
rate = params_rate(hw_params);
err = snd_dice_transaction_set_rate(dice, rate);
if (err < 0)
return err;
if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
return err;
/*
* At 176.4/192.0 kHz, Dice has a quirk to transfer two PCM frames in
* one data block of AMDTP packet. Thus sampling transfer frequency is
* a half of PCM sampling frequency, i.e. PCM frames at 192.0 kHz are
* transferred on AMDTP packets at 96 kHz. Two successive samples of a
* channel are stored consecutively in the packet. This quirk is called
* as 'Dual Wire'.
* For this quirk, blocking mode is required and PCM buffer size should
* be aligned to SYT_INTERVAL.
*/
channels = params_channels(hw_params);
if (mode > 1) {
if (channels > AMDTP_MAX_CHANNELS_FOR_PCM / 2) {
err = -ENOSYS;
return err;
}
rate /= 2;
channels *= 2;
dice->rx_stream.double_pcm_frames = true;
} else {
dice->rx_stream.double_pcm_frames = false;
}
amdtp_stream_set_parameters(&dice->rx_stream, rate, channels,
dice->rx_midi_ports[mode]);
if (mode > 1) {
channels /= 2;
for (i = 0; i < channels; i++) {
dice->rx_stream.pcm_positions[i] = i * 2;
dice->rx_stream.pcm_positions[i + channels] = i * 2 + 1;
}
}
amdtp_stream_set_pcm_format(&dice->rx_stream,
params_format(hw_params));
return 0;
}
static int playback_hw_free(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
mutex_lock(&dice->mutex);
snd_dice_stream_stop(dice);
mutex_unlock(&dice->mutex);
return snd_pcm_lib_free_vmalloc_buffer(substream);
}
static int playback_prepare(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
int err;
mutex_lock(&dice->mutex);
if (amdtp_streaming_error(&dice->rx_stream))
snd_dice_stream_stop_packets(dice);
err = snd_dice_stream_start(dice);
if (err < 0) {
mutex_unlock(&dice->mutex);
return err;
}
mutex_unlock(&dice->mutex);
amdtp_stream_pcm_prepare(&dice->rx_stream);
return 0;
}
static int playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_dice *dice = substream->private_data;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
amdtp_stream_pcm_trigger(&dice->rx_stream, substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
amdtp_stream_pcm_trigger(&dice->rx_stream, NULL);
break;
default:
return -EINVAL;
}
return 0;
}
static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
return amdtp_stream_pcm_pointer(&dice->rx_stream);
}
int snd_dice_create_pcm(struct snd_dice *dice)
{
static struct snd_pcm_ops playback_ops = {
.open = pcm_open,
.close = pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = playback_hw_params,
.hw_free = playback_hw_free,
.prepare = playback_prepare,
.trigger = playback_trigger,
.pointer = playback_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
struct snd_pcm *pcm;
int err;
err = snd_pcm_new(dice->card, "DICE", 0, 1, 0, &pcm);
if (err < 0)
return err;
pcm->private_data = dice;
strcpy(pcm->name, dice->card->shortname);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
return 0;
}

Просмотреть файл

@ -96,10 +96,11 @@ error:
void snd_dice_stream_stop_packets(struct snd_dice *dice)
{
if (amdtp_stream_running(&dice->rx_stream)) {
snd_dice_transaction_clear_enable(dice);
amdtp_stream_stop(&dice->rx_stream);
}
if (!amdtp_stream_running(&dice->rx_stream))
return;
snd_dice_transaction_clear_enable(dice);
amdtp_stream_stop(&dice->rx_stream);
}
void snd_dice_stream_stop(struct snd_dice *dice)

Просмотреть файл

@ -11,292 +11,6 @@ MODULE_DESCRIPTION("DICE driver");
MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_LICENSE("GPL v2");
static int dice_rate_constraint(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_dice *dice = rule->private;
const struct snd_interval *c =
hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_interval *r =
hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval rates = {
.min = UINT_MAX, .max = 0, .integer = 1
};
unsigned int i, rate, mode, *pcm_channels = dice->rx_channels;
for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
rate = snd_dice_rates[i];
if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
continue;
if (!snd_interval_test(c, pcm_channels[mode]))
continue;
rates.min = min(rates.min, rate);
rates.max = max(rates.max, rate);
}
return snd_interval_refine(r, &rates);
}
static int dice_channels_constraint(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_dice *dice = rule->private;
const struct snd_interval *r =
hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval *c =
hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_interval channels = {
.min = UINT_MAX, .max = 0, .integer = 1
};
unsigned int i, rate, mode, *pcm_channels = dice->rx_channels;
for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) {
rate = snd_dice_rates[i];
if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0)
continue;
if (!snd_interval_test(r, rate))
continue;
channels.min = min(channels.min, pcm_channels[mode]);
channels.max = max(channels.max, pcm_channels[mode]);
}
return snd_interval_refine(c, &channels);
}
static int dice_open(struct snd_pcm_substream *substream)
{
static const struct snd_pcm_hardware hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER,
.formats = AMDTP_OUT_PCM_FORMAT_BITS,
.channels_min = UINT_MAX,
.channels_max = 0,
.buffer_bytes_max = 16 * 1024 * 1024,
.period_bytes_min = 1,
.period_bytes_max = UINT_MAX,
.periods_min = 1,
.periods_max = UINT_MAX,
};
struct snd_dice *dice = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned int i;
int err;
err = snd_dice_stream_lock_try(dice);
if (err < 0)
goto error;
runtime->hw = hardware;
for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i)
if (dice->clock_caps & (1 << i))
runtime->hw.rates |=
snd_pcm_rate_to_rate_bit(snd_dice_rates[i]);
snd_pcm_limit_hw_rates(runtime);
for (i = 0; i < 3; ++i)
if (dice->rx_channels[i]) {
runtime->hw.channels_min = min(runtime->hw.channels_min,
dice->rx_channels[i]);
runtime->hw.channels_max = max(runtime->hw.channels_max,
dice->rx_channels[i]);
}
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
dice_rate_constraint, dice,
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
if (err < 0)
goto err_lock;
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
dice_channels_constraint, dice,
SNDRV_PCM_HW_PARAM_RATE, -1);
if (err < 0)
goto err_lock;
err = amdtp_stream_add_pcm_hw_constraints(&dice->rx_stream, runtime);
if (err < 0)
goto err_lock;
return 0;
err_lock:
snd_dice_stream_lock_release(dice);
error:
return err;
}
static int dice_close(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
snd_dice_stream_lock_release(dice);
return 0;
}
static int dice_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_dice *dice = substream->private_data;
unsigned int mode, rate, channels, i;
int err;
mutex_lock(&dice->mutex);
snd_dice_stream_stop(dice);
mutex_unlock(&dice->mutex);
err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
params_buffer_bytes(hw_params));
if (err < 0)
return err;
rate = params_rate(hw_params);
err = snd_dice_transaction_set_rate(dice, rate);
if (err < 0)
return err;
err = snd_dice_stream_get_rate_mode(dice, rate, &mode);
if (err < 0)
return err;
/*
* At 176.4/192.0 kHz, Dice has a quirk to transfer two PCM frames in
* one data block of AMDTP packet. Thus sampling transfer frequency is
* a half of PCM sampling frequency, i.e. PCM frames at 192.0 kHz are
* transferred on AMDTP packets at 96 kHz. Two successive samples of a
* channel are stored consecutively in the packet. This quirk is called
* as 'Dual Wire'.
* For this quirk, blocking mode is required and PCM buffer size should
* be aligned to SYT_INTERVAL.
*/
channels = params_channels(hw_params);
if (mode > 1) {
if (channels > AMDTP_MAX_CHANNELS_FOR_PCM / 2) {
err = -ENOSYS;
return err;
}
rate /= 2;
channels *= 2;
dice->rx_stream.double_pcm_frames = true;
} else {
dice->rx_stream.double_pcm_frames = false;
}
amdtp_stream_set_parameters(&dice->rx_stream, rate, channels,
dice->rx_midi_ports[mode]);
if (mode > 4) {
channels /= 2;
for (i = 0; i < channels; i++) {
dice->rx_stream.pcm_positions[i] = i * 2;
dice->rx_stream.pcm_positions[i + channels] = i * 2 + 1;
}
}
amdtp_stream_set_pcm_format(&dice->rx_stream,
params_format(hw_params));
return 0;
}
static int dice_hw_free(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
mutex_lock(&dice->mutex);
snd_dice_stream_stop(dice);
mutex_unlock(&dice->mutex);
return snd_pcm_lib_free_vmalloc_buffer(substream);
}
static int dice_prepare(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
int err;
mutex_lock(&dice->mutex);
if (amdtp_streaming_error(&dice->rx_stream))
snd_dice_stream_stop_packets(dice);
err = snd_dice_stream_start(dice);
if (err < 0) {
mutex_unlock(&dice->mutex);
return err;
}
mutex_unlock(&dice->mutex);
amdtp_stream_pcm_prepare(&dice->rx_stream);
return 0;
}
static int dice_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_dice *dice = substream->private_data;
struct snd_pcm_substream *pcm;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
pcm = substream;
break;
case SNDRV_PCM_TRIGGER_STOP:
pcm = NULL;
break;
default:
return -EINVAL;
}
amdtp_stream_pcm_trigger(&dice->rx_stream, pcm);
return 0;
}
static snd_pcm_uframes_t dice_pointer(struct snd_pcm_substream *substream)
{
struct snd_dice *dice = substream->private_data;
return amdtp_stream_pcm_pointer(&dice->rx_stream);
}
static int dice_create_pcm(struct snd_dice *dice)
{
static struct snd_pcm_ops ops = {
.open = dice_open,
.close = dice_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = dice_hw_params,
.hw_free = dice_hw_free,
.prepare = dice_prepare,
.trigger = dice_trigger,
.pointer = dice_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
struct snd_pcm *pcm;
int err;
err = snd_pcm_new(dice->card, "DICE", 0, 1, 0, &pcm);
if (err < 0)
return err;
pcm->private_data = dice;
strcpy(pcm->name, dice->card->shortname);
pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->ops = &ops;
return 0;
}
static long dice_hwdep_read(struct snd_hwdep *hwdep, char __user *buf,
long count, loff_t *offset)
{
@ -978,7 +692,7 @@ static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *id)
dice_card_strings(dice);
err = dice_create_pcm(dice);
err = snd_dice_create_pcm(dice);
if (err < 0)
goto error;

Просмотреть файл

@ -171,4 +171,6 @@ void snd_dice_stream_update(struct snd_dice *dice);
int snd_dice_stream_lock_try(struct snd_dice *dice);
void snd_dice_stream_lock_release(struct snd_dice *dice);
int snd_dice_create_pcm(struct snd_dice *dice);
#endif